A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Pilot device for loader and loader
The invention provides a pilot device for a loader and the loader, and relates to the technical field of loader equipment, the pilot device comprises a distribution valve, an oil pressure mechanism, a one-way valve and a pilot valve; the pilot valve comprises a descending valve and a regulating valve; the one-way valve is connected with an oil outlet and an oil return opening of the distribution valve, when the movable arm oil cylinder descends, the oil outlet is communicated with the rod cavity, the oil return opening is communicated with the rodless cavity, and the adjusting valve can control the one-way valve to be converted into an open state from a closed state based on the oil pressure of the descending valve so that the rod cavity can be communicated with the oil return opening through the one-way valve. The movable arm oil cylinder and the power oil cylinder are arranged in the movable arm oil cylinder, so that a rod cavity and a rodless cavity of the movable arm oil cylinder are communicated, the rod cavity and the rodless cavity of the power oil cylinder are in a low-pressure state at the same time, it is guaranteed that a bucket driven by the movable arm oil cylinder floats along with the movable arm when making contact with the ground, and the problem that in the prior art, in the descending movement process of the movable arm, the movable arm is damaged is solved. And the service life of the movable arm is shortened and the cost is increased due to the fact that rigid contact counter impact force is large when the bucket touches the ground.
本发明提供了一种装载机用先导装置及装载机，涉及装载机设备的技术领域，包括分配阀、油压机构、单向阀和先导阀；先导阀包括下降阀和调节阀；单向阀分别与分配阀的出油口和回油口连接，在动臂油缸下降运动时，出油口与有杆腔连通，回油口与无杆腔连通，调节阀能够基于下降阀的油压控制单向阀由关闭状态转换成开启状态，以通过单向阀将有杆腔与回油口连通，以使动臂油缸的有杆腔和无杆腔形成连通状态，此时动力油缸的有杆腔和无杆腔同时处于低压状态，保证了动臂油缸带动的铲斗在触地时随动臂浮动，缓解了现有技术中存在的动臂进行下降运动过程中，铲斗触地由于刚性接触反冲击力较大，导致动臂使用寿命降低，造成成本升高的技术问题。
Pilot device for loader and loader
The invention provides a pilot device for a loader and the loader, and relates to the technical field of loader equipment, the pilot device comprises a distribution valve, an oil pressure mechanism, a one-way valve and a pilot valve; the pilot valve comprises a descending valve and a regulating valve; the one-way valve is connected with an oil outlet and an oil return opening of the distribution valve, when the movable arm oil cylinder descends, the oil outlet is communicated with the rod cavity, the oil return opening is communicated with the rodless cavity, and the adjusting valve can control the one-way valve to be converted into an open state from a closed state based on the oil pressure of the descending valve so that the rod cavity can be communicated with the oil return opening through the one-way valve. The movable arm oil cylinder and the power oil cylinder are arranged in the movable arm oil cylinder, so that a rod cavity and a rodless cavity of the movable arm oil cylinder are communicated, the rod cavity and the rodless cavity of the power oil cylinder are in a low-pressure state at the same time, it is guaranteed that a bucket driven by the movable arm oil cylinder floats along with the movable arm when making contact with the ground, and the problem that in the prior art, in the descending movement process of the movable arm, the movable arm is damaged is solved. And the service life of the movable arm is shortened and the cost is increased due to the fact that rigid contact counter impact force is large when the bucket touches the ground.
本发明提供了一种装载机用先导装置及装载机，涉及装载机设备的技术领域，包括分配阀、油压机构、单向阀和先导阀；先导阀包括下降阀和调节阀；单向阀分别与分配阀的出油口和回油口连接，在动臂油缸下降运动时，出油口与有杆腔连通，回油口与无杆腔连通，调节阀能够基于下降阀的油压控制单向阀由关闭状态转换成开启状态，以通过单向阀将有杆腔与回油口连通，以使动臂油缸的有杆腔和无杆腔形成连通状态，此时动力油缸的有杆腔和无杆腔同时处于低压状态，保证了动臂油缸带动的铲斗在触地时随动臂浮动，缓解了现有技术中存在的动臂进行下降运动过程中，铲斗触地由于刚性接触反冲击力较大，导致动臂使用寿命降低，造成成本升高的技术问题。
Pilot device for loader and loader
装载机用先导装置及装载机
ZHONG JING (author) / TAO SONG (author)
2024-06-04
Patent
Electronic Resource
Chinese
Loader control system, loader, and loader control method
| European Patent Office | 2021